Mechanical movement



(No Model.) 2 Sheets-Sheet 1.

0. R. POLLARD. MECHANICAL MOVEMENT.

No. 421,608. Patented Feb..18, 1890.

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{No Model.) 2 Sheets-Sheet 2 G. R. POLLARD.

MECHANICAL MOVEMENT.

No. 421,608. Patented Feb. 18,1890.

5o arrangement.

UNITED STATES PATENT OFFICE.

CHARLES RICHARD POLLARD, 0F SOMERVILLE, CONNECTICUT.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 421,608, dated February 18, 1890.

Application filed June 24, 1889- To all whom it may concern:

Be it known that 1, CHARLES RICHARD POLLARD, of Somerville, in the county of Tolland and State of Connecticut, have invented certain new and useful Improvements in Mechanical Movements, of which the follow ing is a specification.

My invention has for its object the provision of a mechanical movement whereby the several rods of a series of such devices may be intermittingly reciprocated in a predeten mined order of time, which mechanical movement may be employed for many useful purposes in the mechanic arts-as, for instance, in the operation of harnesses and shuttle-boxes in looms.

My invention consists of a series of eccentrics arranged on an intermittingly-rotating shaft,'movable keys for securing said eccentrics to or releasing the same from said shaft, rods for operating on said keys to key the cocentrics to the shaft, and a pattern device for operating on the rods, a spring or other suit able device operating on the keys to move them in a direct-ion opposite to that in which they are or may be moved by the rods.

Reference is to be had to the annexed drawings and to the letters and figures of reference marked thereon, forming a part of this specification, the same letters and figures designating the same parts or features, as the case may be, wherever they occur.

Of the drawings, Figure 1 is avertical sectional view of an approved form and arrangement of parts comprising my invention. Fig. 1 is a sectional detail of parts shown in Fig. 1, but representing some of the elements in a difierent position. Fig. 1 is a sectional detail of parts shown in'Fig. 1, with additional elements for the control of said parts. Fig. 2 is atop plan view of Fig. 1. Fig. 3 is a sectional detailtaken on the line 3 3 of Fig.1. Fig. 4is a sectional detail taken on the line 4 4 of Fig. 1. Fig. 5 is a sectional detail taken on the line 5 5 of Fig. 1. Fig. 6 is a detail view of parts represented in Fig. 2,.showing said parts in a different position.

In the practical embodiment of my invention I may employ parts of various form and As portrayed in the drawings,

Serial No. 315,371. (No model.)

a designates a rotary shaft, upon which is affixed a gear b, adapted to engage a gear. 0, secured to a shaft cl. The teeth of the gear I) are mutilated in such manner that one rotation of said gear will impart but a half-rotation to gear c and its shaft (1, broad teeth e on gear 0 being contrived to act within the toothless space of gear I) and serve as a stop to gear 0, somewhat on the principle of the so-called Geneva stop, as will be clearly understood by an inspection of Fig. 1 of the drawings.

By the means described, when a regular r0 tary motion is given to shaft a, an intermit tent rotary motion will be imparted to shaft cl in the time of a half-rotation of the latter shaft to a complete rotation of the former.

Upon the shaft d are arranged a series of eccentrics f, each provided with a chambered hub g. h h designate comb and guide plates, supported at their rear ends on rods 1' i and provided toward thelr forward ends and in their adjacent faces with semicircular notches adapting them to fit upon a hub g, and so formed that at the notched point two of such plates may substantially encircle said hub, as shown in Figs. land 1.

The eccentrics f are arranged on shaft d, I

so that the latter may be rotated without atfecting the former, and so that the former may at predetermined times be keyed to or connected with the latter and be actuated thereby. I have contrived various means for effecting this end, that shown in the drawings being among the most serviceable for the purpose. Each eccentric fiis formed and equipped in the same way as each. and every other, so that in describing one a description will be given of all. y

j designates a'pin or key arranged to oper ate radially in a hole formed in the hub g,

and so as to be pressed into either one of two I notches or recesses 70, formed in the shaft 01, said notches being at opposite sides of the shaft. A spring 15, arranged in the chamber of the hub and connected with the pin j, opcrates to normally press and hold the said pin out of either notch lo thus disconnecting the eccentricf from the shaft d.

m n are rods, the former m extending from the pattern-chain 0, between the comb-plates h h, to or nearly to the hub g, and the latter n from the rearward part of the former down beneath and around the forward end of the latter, where it is provided with an angular part 13, which enters between the forward ends of the comb-plates and extends to or nearly to the hub g.

The pattern-chain 0 is arranged on the hub q of wheel 0', so as to be operated thereby, said wheel being constructed to have a stepby-step or intermittent motion imparted to it from shaft (1, the means here shown consisting of an arm 3, secured to shaft a and provided with a laterally-projecting pin 25, adapted to engage notches a in the periphery of wheel 7', and so move said wheel to an extent corresponding to the distance between two notches a. The chain 0 is provided in its path on a line intersecting the rear end of rods m with risers o and sinkers 10, so that when a riser comes in contact with the rear end of said rod m it will press it forward against pin j, and the tension of spring t, causing said pin to pass into one of the notches 7c of the shaft (1, keying'or connecting the eccentric f to said shaft, so as to be turned thereby. Each pin is made of such length and is so constructed that when pressed inward by rod m or it its outer end will just escape the adjacent edge of the combplate It and ride on the surface of the semicircular notch formed in said plate until it.

reaches an opposite point, when it may be thrown outward by spring If into an aperture or a notch formed between the comb-plates, as will be most clearly understood by an inspection of Figs. 1, 1, and 4:. A riser 1300111- ing in contact with the rear end of rod m, will press said rod inward against the tension of spring m, pressing pin j into notch 7a of shaft (Z, as shown in Fig. 1, in which position the pin will be held by the adjacent surfaces of the comb-plates 7L until it reaches an opposite point, when it will be pressed outward out of notch 7e into a notch formed between the forward ends of the comb-plates, as shown in Fig. 1, thus disconnecting the eccentric ffrom shaft (1 and holding it against turning therewith. lVhen a sinker w arrives opposite the rear end of rod m, the latter will be pressed back by spring a", which will also carry rod 71 with it in the same direction, the effect of which will be to move the angular part 1) of rod 01 against pin j, pressing the latter into notch keying its associated eccentric to shaft (Z until the pin reaches an opposite point, when it willbe forced out by spring '6 against the forward end of rod. m into the notch formed between the adjacent faces of the comb-plates h h.

The inner end of pin j maybe made broader orv larger than the outer end, against which the rods m and n operate, so as to strengthen said pin at the point where the greatest strain is brought thereon by the operation of shaft d and hub g thereon, and to accommodate this enlargement of the pin the adjacent face of eccentric f may be chambered slightly, as at 2, Fig. at.

To simultaneously connect all of the eccentrics f with the shaft cl, when it is desirable for any reason that this should be done, I provide the evener-rods 6 6, connected at both of their ends with levers 7, one ofwhich rods is arranged so as to normally rest against the inner side of the vertical portion 8 of rod n, and the other against the outer or rearward side of stud 9, forming part of collar 10, secured to rod m, a spring 11, of greater tension than spring w,being interposed between collar 10 and a collar 12, forming a part of the vertical part 8, and arranged to slide on rod an, all as shown in Figs. 1 and l". Ahandle 13 may be provided on one of the rods 6, so that by moving one of said rods longitudinally both may be brought, through the medium of levers 7, closer together, as shown in Fig. 6, moving rod on and the angular part 19 of rod n inward, and so connecting all of the eccentrics f with shaft (Z, and by moving said rod longitudinally in the opposite direction said rods will be so separated as not to affect the position of the rods m n. But one of the levers '7 is shown, that on the inner ends of the rod 6 being hidden in Fig. 2 by other parts of the contrivance above it. Both levers 7 are the same in form and are pivotally connected with the rods 6 in the same way.

By the means described the rods 14, connected with the eccentrics f, maybe intermittingly reciprocated at predetermined times, and this reciprocatory motion may be made of a positive character.

Having thus explained the nature and purposes of my invention and described one of the ways in which itmay be constructed and used, I declare that what I claim is 1. A mechanical movement consisting of a rotary shaft, an eccentric on said shaft, a

movable key or pin for securing said eccentrio to or releasing it from said shaft, rods for operating on said pin to key the eccentric to the shaft, a spring for moving the pin or key in the opposite direction, and a pattern device for operating on said rods, substantially as set forth.

2. A mechanical movement consisting of a rotary shaft, a series of eccentrics, each provided with a hub arranged on said shaft, a movable key or pin in each hub for securing said eccentrics to or releasing the same from said shaft, mechanism for acting upon said pins, and a pattern device for controlling the operation of said pin-operating mechanism, substantially as set forth.

3. A mechanical movement consisting of a rotary shaft, eccentrics thereon, each provided with a hub, a movable pin or key in. said hubs for connecting the eccentrics to the shaft, the comb-plates h h, rods m a,

spring t, and a pattern device for operating name to this specification, in the presence of on said rods, as set forth. two subscribing witnesses, this 11th day of 4. The pin-operating rods m n, collar 10, June, A. D. 1889. and lug 9, spring 11, evener-rods 6 6,and 0011- CHARLES RICHARD POLLARD. 5 meeting-levers 7, combined and operating sub- Witnesses:

stantially as and for the purpose set forth. ANNA D. POLLARD,

In testimony whereof I have signed my SELONA P. GARLAND. 

